File Filter Research Articles

Just‐in‐time defect prediction enhanced by the joint method of line label fusion and file filtering

AbstractJust‐In‐Time (JIT) defect prediction aims to predict the defect proneness of software changes when they are initially submitted. It has become a hot topic in software defect prediction due to its timely manner and traceability. Researchers have proposed many JIT defect prediction approaches. However, these approaches cannot effectively utilise line labels representing added or removed lines and ignore the noise caused by defect‐irrelevant files. Therefore, a JIT defect prediction model enhanced by the joint method of line label Fusion and file Filtering (JIT‐FF) is proposed. Firstly, to distinguish added and removed lines while preserving the original software changes information, the authors represent the code changes as original, added, and removed codes according to line labels. Secondly, to obtain semantics‐enhanced code representation, a cross‐attention‐based line label fusion method to perform complementary feature enhancement is proposed. Thirdly, to generate code changes containing fewer defect‐irrelevant files, the authors formalise the file filtering as a sequential decision problem and propose a reinforcement learning‐based file filtering method. Finally, based on generated code changes, CodeBERT‐based commit representation and multi‐layer perceptron‐based defect prediction are performed to identify the defective software changes. The experiments demonstrate that JIT‐FF can predict defective software changes more effectively.

A fusion data security protection scheme for sensitive E-documents in the open network environment.

E-documents are carriers of sensitive data, and their security in the open network environment has always been a common problem with the field of data security. Based on the use of encryption schemes to construct secure access control, this paper proposes a fusion data security protection scheme. This scheme realizes the safe storage of data and keys by designing a hybrid symmetric encryption algorithm, a data security deletion algorithm, and a key separation storage method. The scheme also uses file filter driver technology to design a user operation state monitoring method to realize real-time monitoring of user access behavior. In addition, this paper designs and implements a prototype system. Through the verification and analysis of its usability and security, it is proved that the solution can meet the data security protection requirements of sensitive E-documents in the open network environment.

Research and Application of Transparent File Encryption Technology on Android Platform

Aiming at the data security problem of Android platform, a transparent encryption system based on file filter driver is designed and implemented, according to the technology of file transparent encryption and decryption system based on hook transparent encryption technology and file filtering driven transparent encryption technology used on windows platform. This system is different from the traditional APP development method of Android system. By intercepting the system call function and using the secret-key converted from the host MAC address, the encryption and decryption algorithm is written into the kernel, which fundamentally guarantees the security of user information. At the same time, the user's security experience is improved by putting authentication on the screen unlocking. The system design and implementation are described in this paper from system requirement analysis to overall design and detailed design of each module. Android application development technology and cross-compiling principle are used in the coding process. The system test results show that the system can effectively transparently encrypt files and protect the privacy of mobile files.

Similarity Digest Search: A Survey and Comparative Analysis of Strategies to Perform Known File Filtering Using Approximate Matching

Digital forensics is a branch of Computer Science aiming at investigating and analyzing electronic devices in the search for crime evidence. There are several ways to perform this search. Known File Filter (KFF) is one of them, where a list of interest objects is used to reduce/separate data for analysis. Holding a database of hashes of such objects, the examiner performs lookups for matches against the target device. However, due to limitations over hash functions (inability to detect similar objects), new methods have been designed, called approximate matching. This sort of function has interesting characteristics for KFF investigations but suffers mainly from high costs when dealing with huge data sets, as the search is usually done by brute force. To mitigate this problem, strategies have been developed to better perform lookups. In this paper, we present the state of the art of similarity digest search strategies, along with a detailed comparison involving several aspects, as time complexity, memory requirement, and search precision. Our results show that none of the approaches address at least these main aspects. Finally, we discuss future directions and present requirements for a new strategy aiming to fulfill current limitations.

Research and Implementation of Mobile Storage Devices Monitor and Control System

Aiming at the security problems of mobile storage devices, a software which can flexibly control the read and write permissions of mobile storage devices is designed and developed based on file filtering driving technology. The functional tests show that the software is easy to use and can effectively prevent file network-leakage, and enhance the security of the use of mobile storage device.

Mechanism on Computer Access Permission Management Based on the Proposed Dynamic Password Algorithm

With the rapid development of information technology, personal computer privacy and permission management are becoming more and more important. Based on RSA encryption algorithm, we design a dynamic password encryption and codec algorithm, and propose a mechanism on computer access permission management which is capable of dealing with situations both online and offline. In the offline mode, administrators can authenticate users by matching their contact information to that registered in administrators’ mobile terminal. Generated by the co-work of a personal computer and a mobile terminal, the dynamic password makes cracking the password a trickier task. Permission control information is also added into the dynamic password, and file filter system will be loaded once the screen is successfully unlocked, so as to protect private directories or files from being accessed without authorization. In online mode, the system provides real-time video for identity verification, which makes the system more secure and convenient. Experiment results show that this dynamic password based mechanism on computer access permission management is efficient in dealing with existing problems in personal privacy and access permission management.

Research on Key Technology of Webpage Tampering Prevention

Webpage tampering prevention system is a security protection means of website to prevent from hacker’s unauthorized update to webpage. This paper deeply researches the key technology of webpage tampering prevention system, i.e., poll tampering detection technology, core embedding technology and file filtering drive technology, the algorithm of three prevailing tampering prevention detection technologies is realized on the basis of apache platform, they are integrated together to form an exclusive and perfect new type tampering prevention system.

A Reliable File Protection System Based on Transparent Encryption

As data leakage moves to ever more challenging areas, improving the security level of anti-data leakage and lowering overhead to the operating system becomes increasingly important. Therefore, the paper presents a novel double cache file filter driver based on transparent encryption, called as DBFD. In order to boost security of data, that is controlled by the file filter driver. The DBFD overcomes the limitation of double cache in the file system kernel in windows operating system and used the transparent encryption method to protect the data security. To evaluate DBFD, we used Iometer as the measurement tools to measure performance. The simulation results indicate that proposed DBFD has higher security, less overhead to the windows operating system.

Webpage Tamper-Resistant Strategy Based on File System Filter Driver and Event-Triggered

In order to develop a more practical, higher security and less time-consuming webpage tamper-resistant system, we proposed a webpage tamper-resistant strategy on the basis of original tamper-resistant strategies and technologies in the paper. This strategy adopted the file system filter driver and event-triggered technology. It also controlled users writing operations through the file filter driver of the bottom of the system, which can efficiently and actively prevent attackers illegal tampering. At the same time, it had also set up a monitoring module. The monitoring module and the tamper-resistant module formed a self-protection mechanism of the ring. Therefore, the strategy can greatly improve the security of system.

A New Type of the Research and Deployment Strategy for Web-Page Tamper-Resistant

This paper presents a system architecture through a new type of strategy for web-page tamper-resistant. The new strategy emphasizes the following points: by using of file filter technology timely find out and block the malicious tampering so that the illegal malicious tampering is prevented; the tamper-resistant module and digital watermark module are distributed in two different servers and the servers are separated by a firewall to strengthen the overall security of the system; to ensure the security of the tamper-resistant process, it is necessary to deployment a single chip machine to protect the tamper-resistant process.

FRPWPS: A Filter Driver and Reverse Proxy Based Web Protection System

Website attack has seriously affected the owner’s profit and the security of the Internet. In this paper, a Filter Driver and Reverse Proxy based Web Protection System (FRPWPS) with a version control-based safe recovery mechanism is proposed. FRPWPS consists of five sub systems including web file monitor, content publish, web reverse proxy, backup and recovery, and monitor center. The file filter driver is used to protect web program files from illegally tampered. The protected websites are run behind a web proxy with intrusion detection function. The backup and recovery subsystem is realized by a FTP protocol. Experiments analyze the functions and costs of FRPWPS, and results show that it can work well and achieve good performance for web protection.

File Filtering in Stata: Handling Complex Data Formats and Navigating Log Files Efficiently

A text file filter is a program that converts one text file into another on the basis of a set of rules. For statistical applications, a text file filter can convert data embedded in a complicated text file so that Stata can read and analyze it. A text file filter can also automate the production of more user-friendly output from long Stata log files. The file command lets you use text file filters in Stata. This article reviews some key programming points for successful implementation of such filters.

A low-power digital matched filter for direct-sequence spread-spectrum signal acquisition

This paper presents a low-power 128-tap dual-channel direct-sequence spread-spectrum (DSSS) digital matched-filter chip. Design techniques used to reduce the power consumption of the system include latch-based register file filter structure, a high-rate compression scheme, optimized compressor cells, and semicustom layout design. To further reduce the power consumption and the hardware requirement of the clock tree, a double-edge-triggered clocking scheme is adopted. The proposed chip is fabricated using a 0.8-/spl mu/m standard CMOS process. As the experimental results of the chip indicate, the matched filter can operate at 50 MHz and dissipates 184 mW at 5-V supply voltage. The supply voltage can be scaled down to 2 V for lower speed applications. As a consequence, the proposed design has low power consumption and can be used for code acquisition of DSSS signals in portable systems.